Open AccessProcessing advantages of linear chirped fiber Bragg gratings in the time domain realization of optical frequency-domain reflectometry
Author(s) -
R.E. Saperstein,
Nikola Alić,
Steve Zamek,
Kazuhiro Ikeda,
Boris Slutsky,
Yeshaiahu Fainman
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.015464
Subject(s) - optics , fiber bragg grating , reflectometry , chirp , materials science , time domain , dispersion (optics) , physics , optical fiber , laser , computer science , computer vision
The inclusion of a linear chirped fiber Bragg grating for short pulse dispersion is shown to enhance the time domain realization of optical frequency-domain reflectometry. A low resolution demonstrator is constructed with single surface scans containing 140 resolvable spots. The system dynamic range meets that shown in earlier demonstrations without digital post-processing for signal linearization. Using a conjugate pair of chirped pulses created by the fiber grating, ranging is performed with position and velocity information decoupled. Additionally, by probing the target with short pulses and introducing grating dispersion just before photodetection, velocity immune ranging is demonstrated.